Method for preparing modified MCM-41/aluminium oxide composite carrier

A composite carrier and composite material technology, applied in chemical instruments and methods, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problem of poor structural stability of MCM-41 and achieve the effect of improving structural stability

Active Publication Date: 2009-07-15
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the structural stability of MCM-41 is not very good

Method used

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  • Method for preparing modified MCM-41/aluminium oxide composite carrier
  • Method for preparing modified MCM-41/aluminium oxide composite carrier
  • Method for preparing modified MCM-41/aluminium oxide composite carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dissolve 6.6g of sodium fluoride in 50ml of water, add 24g of γ-Al 2 o 3 , soaked for 24h to obtain F-modified alumina. Then add 352ml water glass (modulus is 3.0, SiO 2 The content is 26m%) in the above F-modified γ-Al 2 o 3 In, soak for 6h. Take 6g of cetyltrimethylammonium bromide and mix it with 100ml of water, stir to form a slurry, mix the two, stir for 1h, and adjust the pH value to 11.0 with 2mol / L dilute sulfuric acid. The composition of the mixture is: 4.5Na 2 O: 8.3SiO 2 :Al 2 o3 :0.67F:0.07CTAB:380H 2 O. Hydrothermal crystallization at 140°C for 24h in an autoclave lined with Teflon, the product was taken out, washed 5 times with 100ml of distilled water, dried at 110°C for 12h, and roasted at 550°C for 5h to obtain white MCM-41 / γ -Al 2 o 3 composite material1. XRD results see figure 1.

Embodiment 2

[0039] Dissolve 6.6g of sodium fluoride in 50ml of water, add 24g of γ-Al 2 o 3 , soaked for 24h, get F - Modified alumina. Then add 352ml water glass (modulus is 3.0, SiO 2 The content is 26m%) in the above F-modified γ-Al 2 o 3 In, soak for 6h. Take 6g of cetyltrimethylammonium bromide and mix with 100ml of water, stir to form a slurry, mix the two, after stirring for 1h, adjust the pH value to 12.0 with 2mol / L dilute sulfuric acid, the composition of the mixture is: 4.5Na 2 O: 8.3SiO 2 :Al 2 o 3 :0.67F:0.07CTAB:380H 2 O. Hydrothermal crystallization at 140°C for 48h in an autoclave lined with Teflon, the product was taken out, washed 5 times with 100ml of distilled water, dried at 110°C for 12h, and calcined at 550°C for 5h to obtain white MCM-41 / γ -Al 2 o 3 Composite material 2. XRD results see figure 2.

Embodiment 3

[0041] Dissolve 6.6g of sodium fluoride in 50ml of water, add 24g of γ-Al 2 o 3 , soaked for 24h, get F - Modified alumina. Then add 704ml water glass (modulus is 3.0, SiO 2 The content is 26m%) in the above F-modified γ-Al 2 o 3 In, soak for 6h. Take 6g of cetyltrimethylammonium bromide and mix with 100ml of water, stir to form a slurry, mix the two, after stirring for 1h, adjust the pH value to 12.0 with 2mol / L dilute sulfuric acid, the composition of the mixture is: 4.5Na 2 O: 16.6SiO 2 :Al 2 o 3 :0.67F:0.07CTAB:380H 2 O. Hydrothermal crystallization at 140°C for 24h in an autoclave lined with Teflon, the product was taken out, washed 5 times with 100ml of distilled water, dried at 110°C for 12h, and calcined at 550°C for 5h to obtain white MCM-41 / γ -Al 2 o 3 Composite material 3. XRD results see image 3.

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Abstract

A method for preparing a modified MCM-41 / alumina composite carrier material, belonging to the technical field of new composite materials, using F-modified alumina as an aluminum source, water glass as a silicon source, cetyl trimethyl bromide Ammonium is used as a template to hydrothermally synthesize MCM-41 / alumina composites. Modified alumina is obtained by impregnating alumina in a solution of soluble fluoride. In F-modified alumina, it is prepared by mixing with water glass Mixed with template agent, hydrothermally synthesized MCM-41 / alumina composite material, which further improved the structural stability of MCM-41, adjusted the surface pH of the composite material, and made the MCM-41 / alumina composite material more suitable for diesel fuel Support for hydrodesulfurization, hydrodenitrogenation, aromatics hydrosaturation and heavy distillate hydrotreating catalysts.

Description

technical field [0001] The invention belongs to the technical field of composite new materials, relates to a preparation method of a composite carrier material, and particularly designs a - The preparation method of MCM-41 / alumina composite material prepared by modified alumina. Background technique [0002] Composite materials synthesized by surfactants as templates have broad application prospects and academic research value in the fields of macromolecule conversion, catalysis, catalyst support, adsorption separation, and separation and purification of biomacromolecules. [0003] U.S. Patent US 5098684 provides a kind of method for preparing mesoporous molecular sieve MCM-41, 100g cetyltrimethylammonium hydroxide solution is mixed with 100g tetramethylammonium hydroxide solution (25%), stirs, adds 25g0 .02 microns of silicon oxide hydrate (containing 6wt.% of free water and 4.5wt.% of bound water), the mixture was hydrothermally crystallized overnight at 150 ° C in an aut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/06
Inventor 刘百军黄伟莉
Owner BC P INC CHINA NAT PETROLEUM CORP
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